Harry blackwell



(No Model.)

H. BLACKWELL.

GLAZING TUB.

No. 597,835 Patented Jan, 25,1898.

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lhrrrnn STATES PATENT Ost ich.

HARRY BLAOIUVELL, OF AKRON, OI-IIO, ASSIGNOR TO THE IVIIITMORE, ROBINSONS & COMPANY, OF SAME PLACE.

GLAZlNG-TUB.

SPECIFICATION forming part of Letters Patent No. 597,835, dated January 25, 1898.

Application filed July 9 1897. Serial No- 643341. (No model.)

To (035 2.071103% it new concern/r Be it known that I, HARRY BLAOKWELL, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Glazing-Tubs; and I do hereby declare the following to be a full, clear,

' Heretofore it has been the custom, as I belicvc, to apply this glaze by manually dipping the vessels into the glazing liquid, turning them around until the sides are covered, and then withdrawing them and wiping from the bottom the glaze which has run over it.

It is the object of my invention to provide a vat in which there shall be simple and efiicient mechanical means adapted to cause the even distribution of the glazing on such surfaces of the vessel as it is desired to glaze without running over the surfaces which it is desired to leave unglazed, and therefore obviate the necessity of the subsequent wiping. of these latter surfaces.

,My invention consists of a vat adapted to hold a glazing liquid and provided with bars adapted to support a crock or other vessel and allow it to be rolled along them with its surface in contact with the glazing liquid, there being provision for keeping the bars and surface of the glazing liquid in substanof the glazing solution to efficiently. glaze.

the outside of the crock without running over the bottom or the inside of the crock.

The combinations of parts hereinafter specified, and definitely enumerated in the claims, also describe wherein the invention consists. I do not wish to be understood,

however, as limiting myself to the specific construction shown, as equivalents may be substituted for several of the parts here shown or modified constructions employed.

The drawings clearly show the invention.

Figure I is a plan thereof, the vat being supported on wheels for convenience of locomotion. Fig. II is a vertical longitudinal section of the same, being on the line II II of Fig. I. Fig. III is a vertical transverse section of the same, being on the line III III of Fig. I. Figs. IV and V are details of the supporting bars and elevating -screws, respectively.

Similar letters of reference designate similar parts in the several figures.

Referring to the parts by letters, A represents the vat, which may be supported on wheels 13 or otherwise. In each corner of this vat is the vertical screw O, journaled to the bottom of the vat by means of the foot plate 0, in which said screw is swiveled. The swiveling is accomplished by an annular groove 0, in which lies a pin 0 projecting inward from the foot-plate. These screws pass upward through the crossbars D and engage with internal threads carried by them, whereby a rotation of the screws elevates or depresses these cross-bars. A bar 0 projecting through the head of the screw, provides convenient means for rotating it. These cross-bars D extend nearly across the vat near each end thereof.

Supported by the cross-bars are two or more longitudinal bars E, which from their office I call supporting-bars. These supportingbars simply rest near their ends on the crossbars and may be shifted laterally thereon, and are clamped in position, when properly placed, by an upper crossbar F, which lies parallel with the bar D and has holes through which the screws O loosely pass. A clamping-rod G and thumb-screw g are adapted to draw this bar toward the cross-bar D and thus firmly clamp the supporting-bars E. On the upper surface of each supporting-bar E is secured in suitable manner a strip of rubber or similar material e, which comes approximately to a sharp edge at its highest point.

H represents the vitrifying or glazing liquid in the vat, and h the top surface thereof. I represents a crock or jar which is adapted to be supported by the elastic strips (2 and may roll along the same. 7

In operation the thumb-screws g are loosened and the supporting-bars adjusted laterally, so as to be able to conveniently support I the size of crock which is to be rolled upon to raise or lower the cross-bars and the supporting-bars until the upper edge of the elas-, tic strips are just about on a line with the surface of the liquid. A crock or jar with its clay of the proper consistency to receive the glazing solution is then placed across the supporting-bars near one end of the vat and rolled toward the other end. Two workmen preferablyaccomplish this, one placing the jar on the strips and giving ita rolling'motion and the other receiving the jar at the other end of the vat and removing it.

The strips 0 are made of rubber or similar material, so that they will not injure or indent the sides of the jar as it is rolled across. The upper surface of these strips is so placed with reference to the upper surface of the liquid that the surface of the jar will be im-- mersed as it rolls across the strips just the proper distance to give the desired coatof glazing, while the glazing coating will not pass onto the bottom of the jar orinto the interior thereof. I have found that with jars ofordinary weight if the rubber strips normally stand with their top line just coincident of the surface ofthe liquid the depression which these strips will receive by the weight of the jar when it is rolled across will allow the immersion of the jar, the desired amount.

As the glazingliquid is exhausted in use the supporting-bars are lowered accordingly by means of the screws C.

Vhat I claim is l. A Vat adapted to hold a glazing liquid, in combination with two or more verticallyadjustable bars supported in substantially the same horizontal plane within thevat and adapted to stand in the liquid therein and adapted to support a crock or other vessel and allow it to be rolled along them with its surface in contact with the glazing liquid, substantially as described.

2. A vat adapted to hold a glazing liquid, in combination with two or more horizontal bars adapted to support a crock or other vessel and allow it to be rolled along them with its surface in contact with the glazing liquid, there being strips of rubber or other similar material secured to the top of said bars, substantially as described.

3. The combination of a vat adapted to hold a glazing liquid, vertical screws in the cross-bars supported by said screws and adapted to be raised or lowered thereby, and

supporting-bars carried by said cross-bars and adapted to support a crock or vessel in contact with said glazing liquid, substantially as described. I

at. In combination, the vat A, the vertical screws 0, the cross-bars D engaging therewith, the supporting-bars E carried by said cross-bars,the clamping-bars F engaging with said supporting-bars, and means for causing said bars F and D to clamp said supporting bars E between them,substantially as described.

5. In combination, a vat A, cross-bars D within said vat, means for supportingsaid cross-bars, the supportingbars E carried by ing with said supporting-bars, and means for causing said bars F and D to clamp said supporting-bars between them, substantially as described.

G. In combination, a vat A, the foot-plates a secured to the bottom of said vat, the verti cal screws 0 swiveled to said foot-plates, the

cross-bars D having threads engaging with said vertical screws, the supporting-barsli carried by said cross-bars, said supportingbars being adjustable laterally upon said cross-bars, and means for locking them to the cross-bars, substantially as described.

7'. In combination, the vat A,the vertical screws 0 supported thereby and adapted to rotate, cross-bars D engaging with said vertical screws whereby rotation of the latter raises or lowers said cross-bars, the supporting-bars E resting on said cross-bars, the clamping-bars Fabovesaid cross-bars and parallel with said bars D and having holes through which said screws pass, and the clamping-bolt G and its nut, substantially as described.

8. In combination, a vat A, cross-bars D within said vat near opposite ends thereof, means for supporting and vertically adjusting said cross-bars, the supporting-bars E resting near their ends on said crossbars, the clamping-bars F parallel with said cross-bars and adapted to engage with said supportingbars on their upper sides above the crossbars, means for causing said bars F and D to clamp said supporting-bars tightly between them, and strips e, of rubber or similar material, secured to the tops of said supporting bars between said clamping-bars F, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY BLAOKWELL.

Vitnesses:

' H. B. MANToN,

J OHN J. STARR.

said cross-bars,-the clampingbars F engag- 

